<?php

namespace loader;
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/

/**
 * SplClassLoader implementation that implements the technical interoperability
* standards for PHP 5.3 namespaces and class names.
*
* http://groups.google.com/group/php-standards/web/psr-0-final-proposal?pli=1
*
*     // Example which loads classes for the Doctrine Common package in the
*     // Doctrine\Common namespace.
*     $classLoader = new SplClassLoader('Doctrine\Common', '/path/to/doctrine');
*     $classLoader->register();
*
* @license http://www.opensource.org/licenses/mit-license.html  MIT License
* @author Jonathan H. Wage <jonwage@gmail.com>
* @author Roman S. Borschel <roman@code-factory.org>
* @author Matthew Weier O'Phinney <matthew@zend.com>
* @author Kris Wallsmith <kris.wallsmith@gmail.com>
* @author Fabien Potencier <fabien.potencier@symfony-project.org>
*/
class SplClassLoader
{
	private $_fileExtension = '.php';
	private $_namespace;
	private $_includePath;
	private $_namespaceSeparator = '\\';

	/**
	 * Creates a new <tt>SplClassLoader</tt> that loads classes of the
	 * specified namespace.
	 *
	 * @param string $ns The namespace to use.
	 */
	public function __construct($ns = null, $includePath = null)
	{
		$this->_namespace = $ns;
		$this->_includePath = $includePath;
	}

	/**
	 * Sets the namespace separator used by classes in the namespace of this class loader.
	 *
	 * @param string $sep The separator to use.
	 */
	public function setNamespaceSeparator($sep)
	{
		$this->_namespaceSeparator = $sep;
	}

	/**
	 * Gets the namespace seperator used by classes in the namespace of this class loader.
	 *
	 * @return void
	 */
	public function getNamespaceSeparator()
	{
		return $this->_namespaceSeparator;
	}

	/**
	 * Sets the base include path for all class files in the namespace of this class loader.
	 *
	 * @param string $includePath
	 */
	public function setIncludePath($includePath)
	{
		$this->_includePath = $includePath;
	}

	/**
	 * Gets the base include path for all class files in the namespace of this class loader.
	 *
	 * @return string $includePath
	 */
	public function getIncludePath()
	{
		return $this->_includePath;
	}

	/**
	 * Sets the file extension of class files in the namespace of this class loader.
	 *
	 * @param string $fileExtension
	 */
	public function setFileExtension($fileExtension)
	{
		$this->_fileExtension = $fileExtension;
	}

	/**
	 * Gets the file extension of class files in the namespace of this class loader.
	 *
	 * @return string $fileExtension
	 */
	public function getFileExtension()
	{
		return $this->_fileExtension;
	}

	/**
	 * Installs this class loader on the SPL autoload stack.
	 */
	public function register()
	{
		spl_autoload_register(array($this, 'loadClass'));
	}

	/**
	 * Uninstalls this class loader from the SPL autoloader stack.
	 */
	public function unregister()
	{
		spl_autoload_unregister(array($this, 'loadClass'));
	}

	/**
	 * Loads the given class or interface.
	 *
	 * @param string $className The name of the class to load.
	 * @return void
	 */
	public function loadClass($className)
	{
		if (null === $this->_namespace || $this->_namespace.$this->_namespaceSeparator === substr($className, 0, strlen($this->_namespace.$this->_namespaceSeparator))) {
			$fileName = '';
			$namespace = '';
			if (false !== ($lastNsPos = strripos($className, $this->_namespaceSeparator))) {
				$namespace = substr($className, 0, $lastNsPos);
				$className = substr($className, $lastNsPos + 1);
				$fileName = str_replace($this->_namespaceSeparator, DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
			}
			$fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . $this->_fileExtension;

			require ($this->_includePath !== null ? $this->_includePath . DIRECTORY_SEPARATOR : '') . $fileName;
		}
	}
}